Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

SECTION – A

problem1)a) For the purpose of conducting a test of difference of two means, describethe levels of measurement for the variousvariables that are involved.

b) A retailer which sells home entertainment systems accumulated 10451 sales invoices during the previous year. The total of the sales amount on these invoices as claimed by the company is Rs. 63,84,675. In order to estimate the true total sales for last year, an independent auditor randomly selects 350 of the invoices and determines the actual sales amounts by contacting the purchasers. The mean and standard deviation of the 350 samples sales amounts are Rs.532 and standard deviation 168. Find the point and interval estimate given that a 95% confidence is required. Do you think that the amount of invoices claimed by the accounts department is correct?

problem2) FedEx and UPS are the world’s two leading cargo carriers by volume and revenue. According to the Airports Council International, the Memphis International Airport (FedEx) and Louisville International airport (UPS) are two of the ten largest cargo airports in the world. A sample of cargo handled in the two airport were recorded and based on the same can we conclude that there is a difference in the cargo handled by the two airports.

Memphis    9.1    15.1    8.8    10    7.5    10.5    8.3    9.1    6    5.8    12.1    9.3

Louisville     4.7    5.0     4.2    3.3    5.5     2.2    4.1    2.6    3.4    7.0    6.3    5.8

Use 5% level of significance to verify the above problem.

SECTION – B

Mr. LePew, the advertising manager of a medium sized manufacturer of rug and room deodorizers, has developed three preliminary advertising campaigns for the company’s line of deodorizers. The three campaigns are tested in an independent sample of 24 cities across the US and the sales in each city are monitoried.( note: cities are randomly assigned to each campaign and cities are comparable in terms of various socioeconomic and demographic variables)

                  Sales in the cities
Adv 1     10    6    8    12    6    8    9    7
Adv 2      9     7    6    10    6    4    5    5
Adv 3    12    10   8    13    11  10  9    7

The data for the above were analyzed for basic descriptive statistics and the results are given below:

Table 1

1428_Statistic results.jpg

Table 2

1084_Descriptive table.jpg

Table 3

Levene Statistic    df1    df2    Sig.
.023                     2    21    .978

Table 4

                                             Multiple comparison

Dependent Variable: sales
Tukey HSD                                          
(I) type of ad campaign  (J) type of ad campaign  Mean Difference (I-J)  Std. Error  Sig.    95% Confidence Interval
                                                                                                                                    Lower Bound    Upper Bound
     adv1                                   adv2                            1.75000         1.02062    .223      -.8225              4.3225
                                                adv3                           -1.75000        1.02062    .223      -4.3225              .8225
    adv2                                     adv1                           -1.75000        1.02062    .223      -4.3225              .8225
                                                adv3                           -3.50000(*)    1.02062    .007      -6.0725            -.9275
    adv3                                     adv1                              1.75000       1.02062    .223      -.8225              4.3225
                                                adv2                              3.50000(*)   1.02062    .007       .9275              6.0725
*  The mean difference is significant at the .05 level.

Case problems:

a) State the null and alternative hypothesis for the above problem.

b) Perform the suitable hypothesis at 5% level of significance. ( table value  = 3.47)

c) State all the assumptions for carrying out the above test. Verify based on the output given in the problem whether each of the assumptions are satisfied and justify your answer.

d) Based on the data given in fourth table as well as that obtained by you in part (b) above, interpret the complete result and state your recommendation.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M93188

Have any Question? 


Related Questions in Statistics and Probability

1 what aspects of data analysis can be performed by

1. What aspects of data analysis can be performed by computers, and what are the advantages of using them to do so? 2. Review the procedures used to verify that collected data are coded and entered correctly before they ...

A shoe company checks police records on 1200 randomly

A shoe company checks police records on 1200 randomly selected auto accidents and notes that teenagers were at the wheel in 180 of them. Construct a 90% confidence interval estimate of the proportion of shoe accidents th ...

1 how can partial correlation help researchers explore

1. How can partial correlation help researchers explore possible causal relationships among correlated variables? 2. When is the Spearman rank-order correlation used? 3. What is a dichotomous variable? What correlations ...

1 why are psychologists sometimes interested in

1. Why are psychologists sometimes interested in epidemiology? 2. Why do researchers use probability rather than nonprobability samples when doing descriptive research?

In a recent funding drive in support of classical radio it

In a recent funding drive in support of classical radio, it was announced that 11.35% of the listeners actually donated to the radio station. A survey of 225 listeners found that 10.75% of the listeners had actually dona ...

A research concludes that the number of hours of exercise

A research concludes that the number of hours of exercise per week for adults is normally distributed with a mean of 3.5 hours and a standard deviation of 3 hours. Show all work. Just the answer, without supporting work, ...

A car dealership has 6red12silver and 5black cars on the

A car dealership has 6red,12silver, and 5black cars on the lot. Ten cars are randomly chosen to be displayed in front of the dealership. Complete parts (a) through (c) below. (a) Find the probability that 4 cars are red ...

Imagine that your town or city has increased its nighttime

Imagine that your town or city has increased its nighttime police patrols to reduce crime. Design two quasi-experiments to determine whether this intervention has been effective, one that uses some variation of a nonequi ...

A war of attrition game two small grocery stores on the

A war of attrition game.) Two small grocery stores on the same block are feeling the effects of a large supermarket that was recently constructed a half-mile away. As long as both remain in business, each will lose $1000 ...

A professor of management has heard that twelve students in

A professor of management has heard that twelve students in his class of 46 have landed an internship for the summer. Suppose he runs into two of his students in the corridor. a. Find the probability that neither of thes ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro